Crittenden-Livingston Water District has lifted its boil water order that had been in place since Sunday.
The advisory was initiated after a bloom of algae on the Cumberland River created raw water issues for the plant in Pinckneyville in Livingston County.
Although the algae was non-toxic, it caused water quality and compliances issues for the district.
The order was lifted at about 2:30pm Wednesday after favorable test results were found at various points on the water distribution system.